Abstract: A theoretical model of dilatancy and fracture of a brittle rock due to growth of many initial cracks under uniaxial compression is presented, assuming that a group of biggest and most rarely distributed of them is the leading one, and cracks of this group are markedly increased in their sizes. Central point of our consideration is the assumption, that this growth occurs throught formation and propagation of cracks of tear type, branching from the initial ones of shear type, and becomes possible only if these shear initial cracks are expanded perpendicularly to the axis of compression. Comparison of the theoretical results obtained, with the experimental ones is presented.
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1989. A.A. Balkema. Permission to Distribute - International Society for Rock Mechanics.
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